of the modem issuing the “Goodbye” message then it will commence its power up sequence and restart.
The battery powered modem will power up within 5 seconds after the external supply is applied given that the battery and capacitors are fully charged and that the modem is operating at room temperature. If the battery and capacitors are not fully charged and/or the modem is not operating at room temperature then the power up sequence will take longer.
Antennae.
The Delta Plus MOBILE II GSM/GPRS modem is designed to work with many industry standard antennae. Connection to the antenna is via a flying lead terminated with a SMA type
Subscriber Identity Module card.
This product requires a suitable Subscriber Identity Module (SIM) card inserted in the right hand side of the modem. The SIM card is provided by the network service provider eg. O2, Vodafone, Orange etc. This card must be data enabled, ie. a voice only SIM will not work. Additionally, if the product is to be used for GPRS applications then the SIM card must be GPRS enabled. This mode will be set as either mobile originate or terminate (IP listen) depending upon the users requirements.
ASLH Ltd. is able to provide network service supplied by the aforementioned companies.
Configuring the modem
This is achieved by the use of the standard Hayes(™) AT command set as utilised in conventional land line modems. A comprehensive list of AT commands used by the Delta Plus MOBILE II GSM/GPRS modem follows.
AT Command set
AT+ commands should be used alone, not concatenated ie AT+Y<cr> not AT+YS0=1<cr> etc).
AT A
Answer mode enable
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